Real Time: “Secondary Air Pump Stuck Off” (1 Viewer)

[Markuson]

Never seen this one...
Anyone have insight on this?

And like any other thing... 4Lo blinking and center diff blinking.

Truck sat in driveway last 4 days. Just started it up and got these...

 

[Markuson]

Quick update…
drove around a bit… Restarted… Center diff lock flashing still but for low indicator off again. Drove around a bit more… Stopped and started… And now both dash lights have disappeared… And it is no longer generating the codes.

So I am functioning normally again, including the ability to shift in and out of four low.

!

Still interested in any insight y’all might have…

 

[40Man]

IIRC from my Tundra ownership and forum viewing, these are quite common on the Tundra indicating an air pump failure, but you'll have to go and review to confirm. Many Tundra owners put in a bypass and block off plates to avoid a costly repair. Stupid emission crap.

 

[Markuson]

IIRC from my Tundra ownership and forum viewing, these are quite common on the Tundra indicating an air pump failure, but you'll have to go and review to confirm. Many Tundra owners put in a bypass and block off plates to avoid a costly repair. Stupid emission crap.

hmmm... good thing I just passed smog a couple months ago…

How costly is “costly” IYRC?

 

[linuxgod]

hmmm... good thing I just passed smog a couple months ago…

How costly is “costly” IYRC?

IIRC the fix is not cheap, and there are 2 main parts that can go back (the pump and the valves), so let's hope one of the valves was just stuck and it's freed up. IIRC @TonyP replaced his failed system with a bypass box which is a couple hundred bucks, but I'm not sure if it would get flagged in CA smog testing.

 

[CharlieS]

I want to say the Hewitt gen 2 kit was around $400.

 

[linuxgod]

Tundra, but a good explanation of the issue.

Tundra and Sequoia $4000 Air Injection System Problem

UPDATE: As of November 2011 (nearly 18 months after this problem first came to our attention), Toyota has finally announced a special service campaign to cover this repair. You can learn more about Toyota’s Air Injection Pump Extended Warranty Campaign here. It’s been brought to our attention...

tundraheadquarters.com

Engine Trouble Codes Set By This Problem​

P0418, P0419, P2440, P2441, P2442, P2443, P2445, and/or P2447

Unfortunately, the codes aren’t always specific to a particular component. In order to figure out what’s broken, first the pumps must be tested for function. If the pumps aren’t working, they must be removed and checked for moisture. If the pumps are wet, at least one of them must be replaced. If not, connectors must be checked. Then, regardless of moisture or connection, the valves must also be checked.

 

[linuxgod]

I want to say the Hewitt gen 2 kit was around $400.

Yes it's absolutely the way to go, if your state doesn't notice the issue. Not so sure with CA. Also it's my understanding that the kit solves the issues with a bad pump, but if one of the valves is stuck *open* I think you're screwed. If it's closed (or stuck closed) then I think you're OK. (at least that's my understanding)

 

[lowenbrau]

Toyota warrantied my 08 Tundra at 200,000km and 8 years old under some loyalty program. It was going to be $3000 otherwise, Iirc. It would be worth checking before you buy the plate. I understand it's a PITA to swap.

 

[Ratchey]

I had the same issue after I did the Valley Plate leak. The codes kept coming back after clearing them.
I did the Hewitt plate block fix. It is a pain in the ass to do but haven't had any issues since.
It was about $400 but worth it not to have to try to pull the air injectors out again.

 

[CharlieS]

Yes it's absolutely the way to go, if your state doesn't notice the issue. Not so sure with CA. Also it's my understanding that the kit solves the issues with a bad pump, but if one of the valves is stuck *open* I think you're screwed. If it's closed (or stuck closed) then I think you're OK. (at least that's my understanding)

Great points. The kit is pretty unobtrusive (the control box replaces two driver modules in a bracket near the brake master cylinder), and yes it is a hassle to install. Not hard, but the space at the back of the engine is tight where you need to plug the bypass in. They do offer add on kits if the air switching valves are bad as well. There's always the risk that a sharp inspector might catch it in a visual inspection though.

 

[TLC2013]

This issue is far more common with the tundras and is a weak spot in the 5.7 emissions system. I have the Hewitt gen 2 in the garage just as a precaution.
Seems like moisture and water is the common variable that leads to the failure.

Now that the 200 seriers has been in service for a decade plus i wonder if this will become more common like we see with the tundra and sequioa. At least on MUD this problem is rarely reported.

 

[CharlieS]

@TLC2013 my speculation is that it is a numbers game. So many more Tundras sold than Cruisers. Even among the cruiser population, I suspect that the group of enthusiasts that post actively on sites like this are a pretty low percentage. But that's pure speculation.

 

[TLC2013]

@TLC2013 my speculation is that it is a numbers game. So many more Tundras sold than Cruisers. Even among the cruiser population, I suspect that the group of enthusiasts that post actively on sites like this are a pretty low percentage. But that's pure speculation.

I agree. I think you are 100% correct. This is what had me nervous enough to proactively by one ahead of time. Disappointing that this is even an issue on the Land Cruiser.

 

[Sandroad]

I agree. I think you are 100% correct. This is what had me nervous enough to proactively by one ahead of time. Disappointing that this is even an issue on the Land Cruiser.

And it really disappoints me that apparently Toyota disables critical off-road functions for an emission issue (if the @Markuson experience shows that)

 

[empty80]

When I had my fuse issue on the emissions circuit, I installed the electronic harness for the Hewitt SAIS as a diagnostic. I can attest to how snug the air injection pumps are against the firewall. It would be very labor intensive to replace. My assumption is either the engine would have to come out or the body would have to be raised because you can barely get a hand back there to undo a wiring harness.

If push comes to shove, I would target the air injection drivers before the pumps. That’s very low-hanging fruit as a first step, and they can be harvested from Tundras. Worst case scenario, there may be an Hewitt SAIS in the classifieds.

 

[bloc]

And it really disappoints me that apparently Toyota disables critical off-road functions for an emission issue (if the @Markuson experience shows that)

Call me jaded but I bet this "feature" makes it into the 300 as well.

 

[CharlieS]

When I had my fuse issue on the emissions circuit, I installed the electronic harness for the Hewitt SAIS as a diagnostic. I can attest to how snug the air injection pumps are against the firewall. It would be very labor intensive to replace. My assumption is either the engine would have to come out or the body would have to be raised because you can barely get a hand back there to undo a wiring harness.

If push comes to shove, I would target the air injection drivers before the pumps. That’s very low-hanging fruit as a first step, and they can be harvested from Tundras. Worst case scenario, there may be an Hewitt SAIS in the classifieds.

Side note as @empty80 mentioned, the Tundra uses the same driver modules. I found a set on eBay from a salvage yard (with a warranty) that fixed my issues.

My understanding is that the pumps commonly go bad from water intrusion. You can manually jumper the pumps from the connectors in the engine bay, at the passenger side front of the engine and near the passenger frame rail. If you apply 12v power and ground to the plugs one at a time, a working pump will spin and be very clearly audible (like a vacuum cleaner sound). It is an easy way to either diagnose or rule out the two pumps.

 

[Cruisin911]

Toyota warrantied my 08 Tundra at 200,000km and 8 years old under some loyalty program. It was going to be $3000 otherwise, Iirc. It would be worth checking before you buy the plate. I understand it's a PITA to swap.

When my system went bad, I tried this route with Toyota Corporate and was told "this extended warranty does not extend to the Land Cruiser" to which I replied "the Land Cruiser that has the same engine and same system as the Tundra and Sequoia that are both covered under the warranty but the LC isn't?" to which she confirmed. Toyota would not honor the warranty whatsoever on my 2011 and wanted a $100 diagnostic fee just to make sure it was part of the air injection system.

Hewitt bypass was quickly ordered and not a single issue since install.

 

[04UZJ100]

Bypass it. Screw spending money on something the EPA forced down Toyota’s throat.